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Efficacy of oil-based formulations of Bacillus thuringiensis Berliner var. kurstaki against the hemlock looper, Lambdina fiscellaria fiscellaria (Guen.) (Lepidoptera: Geometridae) 1989. West, R.J.; Raske, A.G.; Retnakaran, A.; Lim, K.P. The Canadian Entomologist 121: 55-63.
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